@article{Ade Indra_2020, title={Determination of the properties of the alumina ceramic sintered body after the particle size reduction}, url={//journal.itny.ac.id/index.php/ReTII/article/view/2041}, abstractNote={<p><em>Alumina sintered bodies (Al<sub>2</sub>O<sub>3</sub>), in the form of pellets, have been made by varying the size of particles. The initial particles were sieved on a 200-270 mesh (53-74 μm). The other sizes were refined using a centrifugal hammer mill and then sieved to obtain particles retained on the 270 mesh (&gt; 54 μm) and the 400 mesh (37-53 μm), and those passed the 400 mesh (&lt;37 μm). Polyvinyl alcohol (PVA) liquid as a binder was added into each of these size variations. The process of mixing alumina with PVA (alcohol as a diluent) was carried out for 2 h in a rotary drum with a ceramic ball in it. The mixture was dried at room temperature for 48 h to remove the alcohol. The mixture was smoothed again using a rotary drum for 2 h with a ceramic ball in it. Green bodies were made by uniaxial pressing method at a pressure of 100 MPa. The sintering process was carried out by preheating at a temperature of 700<sup>o</sup>C with a holding time of 1 h to eliminate PVA, and then the temperature was increased to 1200<sup>o</sup>C with a holding time of 2 h. During the sintering, the heating rate was maintained at 5<sup>o</sup>C/minute. The physical characteristics of the alumina sintered bodies were determined by testing the linear shrinkage, density, and microstructure characterization. Density increased with decreasing particle size, from 2.096 gr/cm<sup>3</sup> to 2.140 gr/cm<sup>3</sup> with an increase in relative density of 2%. The results showed a change in physical properties along with the reduction in the size of the alumina particles</em><em>.</em></p&gt;}, journal={ReTII}, author={Ade Indra}, year={2020}, month={Oct.}, pages={115-121} }